//
//  UIView+Additions.h
///  MyProject
//
//  Created by Pei on 16/6/19.
//  Copyright © 2016年 Xiaobo Pei. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface UIView (Additions)
/**
 * Shortcut for frame.origin.x.
 *
 * Sets frame.origin.x = left
 */
@property(nonatomic) CGFloat left;

/**
 * Shortcut for frame.origin.y
 *
 * Sets frame.origin.y = top
 */
@property(nonatomic) CGFloat top;

/**
 * Shortcut for frame.origin.x + frame.size.width
 *
 * Sets frame.origin.x = right - frame.size.width
 */
@property(nonatomic) CGFloat right;

/**
 * Shortcut for frame.origin.y + frame.size.height
 *
 * Sets frame.origin.y = bottom - frame.size.height
 */
@property(nonatomic) CGFloat bottom;

/**
 * Shortcut for frame.size.width
 *
 * Sets frame.size.width = width
 */
@property(nonatomic) CGFloat width;

/**
 * Shortcut for frame.size.height
 *
 * Sets frame.size.height = height
 */
@property(nonatomic) CGFloat height;

/**
 * Shortcut for center.x
 *
 * Sets center.x = centerX
 */
@property(nonatomic) CGFloat centerX;

/**
 * Shortcut for center.y
 *
 * Sets center.y = centerY
 */
@property(nonatomic) CGFloat centerY;

/**
 * Return the x coordinate on the screen, taking into account scroll views.
 */
@property(nonatomic,readonly) CGFloat screenViewX;

/**
 * Return the y coordinate on the screen, taking into account scroll views.
 */
@property(nonatomic,readonly) CGFloat screenViewY;

/**
 * Return the view frame on the screen, taking into account scroll views.
 */
@property(nonatomic,readonly) CGRect screenFrame;

/**
 * Shortcut for frame.origin
 */
@property(nonatomic) CGPoint origin;

/**
 * Shortcut for frame.size
 */
@property(nonatomic) CGSize size;


/**
 * Finds the first descendant view (including this view) that is a member of a particular class.
 */
- (UIView*)descendantOrSelfWithClass:(Class)cls;

/**
 * Finds the first ancestor view (including this view) that is a member of a particular class.
 */
- (UIView*)ancestorOrSelfWithClass:(Class)cls;
//- (BOOL) hasChildView:(UIView*)childView;

/**
 * Removes all subviews.
 */
- (void)removeAllSubviews;


/**
 * The view controller whose view contains this view.
 */
- (UIViewController*)viewController;

- (id)findFirstResponder;

- (void)drawLineWithX:(CGFloat)x withY:(CGFloat)y withWIDTH:(CGFloat)width withHEIGHT:(CGFloat)height;

- (void)centerInVertical;

- (void)centerInHorizontal;

- (void)centerInGravity;

@end
